- 2023 - 2028 Response of biogeochemical cycle and lower trophic ecosystem to the environmental change in the Southern Ocean, East Antarctica
- 2022 - 2025 Plankton communities contributing to marine biological pump on the global scale
- 2021 - 2025 北極海洋生態系を育む「種」を運ぶDirty Iceの役割とその空間分布の解明
- 2021 - 2024 A New paradigm of nitrogen cycle in the marine subsurface layer controlled by trace metals
- 2020 - 2022 The changing nitrogen cycle and its impact on lower ecosystem in the Southern Ocean
- 2019 - 2022 Integrative understanding of marine nitrogen fixation based on global observations from tropics to polar regions.
- 2018 - 2021 Complex regulation of nitrogen cycle by trace metals in the subsurface ocean
- 2014 - 2017 Nitrification in the marine euphotic zone
- 2013 - 2016 The development of the method to estimate the experienced environment by fish using stable isotope analysis
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